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Service bulletins for the 2015 Hyundai Sonata

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

303 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
19-01-006H-42019-11-18. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ELECTRICAL SYSTEM:WIRING. Applicable vehicles with 2.0L Turbo and 2.4L GDI engines may experience the Check Engine warning lamp illuminated with DTC P1326. Follow the procedure to inspect the vehicle and install a wire harness extension and/or replacement engine based on the inspection results.
19-01-002H-42019-11-18. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ENGINE. Hyundai is conducting a product improvement campaign to enhance the knock sensor software to detect abnormal engine bearing noise before potentially severe engine damage occurs. If abnormal engine bearing noise is detected, the Malfunction Indicator Lamp (MIL) will blink continuously, a chime will sound on certain vehicles, and the vehicle will be placed in Engine Protection Mode allowing the customer to drive to the nearest Hyundai dealer for diagnosis and repair. In addition, DTC P132600 will be recorded in the ECM. The vehicle can continue to be operated for a limited time in Engine Protection Mode, but it will accelerate slower and have a reduced maximum speed. Engine RPMs will be limited to approximately 1800-2000 RPM.
Campaign 953 Dea2019-11-18. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM:SOFTWARE; ENGINE; EQUIPMENT. Hyundai has developed a new engine monitoring technology called a Knock Sensor Detection System (KSDS). The technology uses software innovations and leverages existing engine sensors to continuously monitor for symptoms that may precede an engine failure.
Campaign T3G Dea2019-11-18. Service bulletin. ENGINE; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; ELECTRICAL SYSTEM. Hyundai has launched a Service Campaign for applicable vehicles with 2.0L Turbo and 2.4L GDI engines that may experience the Check Engine warning lamp illuminated with DTC P132600.
19-HC-002H2019-09-30. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. This bulletin provides instructions for a Battery Management System (BMS) software update to optimize DTC P1B70 - HEV Battery Voltage Too Low diagnostic control logic.
19-EE-001H-12019-08-19. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. This bulletin provides information on how to return a Hyundai HEV/PHEV/EV/Fuel Cell Lithium Battery for proper disposal and safe environmental recycling using Hyundai?s authorized vendor Kinsbursky Brothers Intl. (KBI).
19-BE-010H2019-07-01. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information related to clearing all Diagnostic codes for vehicles equipped with the Blue Link system (Gen 1).
19-EE-003H2019-05-20. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. The following summarizes the service procedures for Lithium Battery replacement:
19-FL-003H2019-05-20. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM. This bulletin provides the procedure to write the Vehicle Identification Number (VIN) during the replacement of the Engine Control Module (ECM) or Powertrain Control Module (PCM). Once the VIN has been programmed to the ECM/PCM, it cannot be removed or overwritten.
Campaign 953 ECM2019-04-22. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Hyundai has launched a Product Improvement Campaign to perform a knock sensor software update on applicable vehicles.
953 Dealer Best2019-03-18. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ENGINE. Hyundai has developed a new engine monitoring technology called a Knock Sensor Detection System (KSDS). The technology uses software innovations and leverages existing engine sensors to continuously monitor for symptoms that may precede an engine failure. Watch this video to learn more. The KSDS software continuously monitors engine vibrations for unusual patterns that develop as an engine connecting rod bearing wears abnormally that could later cause engine seizure. If vibrations caused by bearing wear start to occur, the malfunction indicator lamp will blink continuously, an audible chime will sound and the vehicle will be placed in a temporary engine protection mode with reduced power and acceleration. At that time, Diagnostic Trouble Code (DTC) P132600 will be recorded in the ECM. In addition, Hyundai will extend the warranty to 10 years and 120,000 miles (up from 100,000 miles) for original and subsequent owners of the covered vehicles for engine repairs needed because of excessive connecting rod bearing damage.
5NP-M7Z5K-022019-02-19. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information on how to return a Hyundai HEV/PHEV/EV/Fuel Cell Lithium Battery for proper disposal and safe environmental recycling using Hyundai?s authorized vendor Kinsbursky Brothers Inc. (KBI).
5NP-W4W6L-012019-02-19. Service bulletin. ELECTRICAL SYSTEM. Hyundai is conducting a product improvement campaign to enhance the knock sensor software to detect abnormal engine bearing noise before potentially severe engine damage occurs. If abnormal engine bearing noise is detected, the Malfunction Indicator Lamp (MIL) will blink continuously, a chime will sound on certain vehicles, and the vehicle will be placed in Limp Home Mode allowing the customer to drive to the nearest Hyundai dealer for diagnosis and repair. In addition, DTC P132600 will be recorded in the ECM. The vehicle can continue to be operated for a limited time in Limp Home Mode, but it will accelerate slower and have a reduced maximum speed. Engine RPMs will be limited to approximately 1800-2000 RPM.
5NP-L6Z7X-012019-02-19. Service bulletin. ELECTRICAL SYSTEM. Hyundai has launched a Product Improvement Campaign to perform a knock sensor software update on the subject vehicles. This campaign is being implemented to ensure the satisfaction of Hyundai customers. The software update installs a newly developed Knock Sensor Detection System (KSDS) that detects vibrations indicating the onset of excessive connecting rod bearing wear in the engine. The KSDS is designed to alert a vehicle driver at an early stage of bearing wear before the occurrence of engine damage. If vibrations caused by bearing wear start to occur, the Malfunction Indicator Lamp (MIL) will blink continuously, an audible chime will sound, and the vehicle will be placed in Limp Home Mode. At that time, Diagnostic Trouble Code (DTC) P132600, specific to the KSDS, will be recorded in the ECM. The vehicle can continue to be operated for a limited time in Limp Home Mode, but it will accelerate slowly and have a reduced maximum speed with RPMs limited to approximately 1800-2000 RPM.
5NP-S6S9Z-122018-12-17. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This bulletin provides information related to a BMS (Battery Management System) ECU software update that must be performed after replacing a high voltage Lithium Battery in a Sonata HEV (YF HEV) or Tucson Fuel Cell Electric Vehicle (LM FCEV).
5NP-E6X6V-122018-12-17. Service bulletin. ELECTRICAL SYSTEM; ENGINE. Hyundai is conducting a product improvement campaign to enhance the knock sensor software to detect abnormal engine bearing noise before potentially severe engine damage occurs. If abnormal engine bearing noise is detected, the Malfunction Indicator Lamp (MIL) will blink continuously, a chime will sound, and the vehicle will be placed in Limp Home Mode allowing the customer to drive to the nearest Hyundai dealer for diagnosis and repair. In addition, DTC P132600 will be recorded in the ECM. The vehicle can continue to be operated for a limited time in Limp Home Mode, but it will accelerate slower and have a reduced maximum speed. Engine RPMs will be limited to approximately 1800-2000 RPM.
5NP-Q3Q2Y-052018-05-21. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. This bulletin describes the procedure to repair a condition with the radio changing bands/switching modes between AM>FM>SXM (intermittently) on its own.
5NP-D2K8B-022018-02-12. Service bulletin. BACK OVER PREVENTION: CAMERA SYSTEM; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; ELECTRICAL SYSTEM:SOFTWARE. When towing a trailer with some LF/LF-HEV/LF-PHEV Sonatas or some AN/NC Santa Fe vehicles equipped with the Blind Spot Detection (BSD) feature, the trailer may interfere with the BSD system operation resulting in cancellation of the BSD operation. When this occurs, a ?BSD canceled? message is displayed in the vehicle?s instrument cluster. The ?BSD canceled? message remains on even if the customer manually disables the BSD system, and may result in customer complaints. This bulletin provides the service procedure to update the system software to turn off the ?BSD canceled? message when the BSD system is manually disabled.
5NP-A5H5K-112017-11-14. Service bulletin. ELECTRICAL SYSTEM. If you are servicing a Sonata Hybrid with any of the warning messages or comments listed below, follow the Service Procedure to diagnose the condition. ? Hybrid Warning Message was illuminated ? Dash displayed a message: ?Check Hybrid System, Turn off engine? ? Diagnostic Trouble Code P0705 ? Transmission range sensor circuit
5NP-Z5P9K-122017-10-15. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. Hyundai Motor America is conducting a Service Campaign to update the ECM software and inspect and (if necessary) replace the VCM actuator on certain 2015-16MY Sonata 2.4L vehicles. Service Campaign T1H provides a procedure to update the ECM software and inspect the VCM actuator.
5NP-T7S8A-122017-10-15. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This bulletin provides a logic update and inspection for CEL (?Check Engine Light?) ON with DTC P200A (Intake Manifold Runner Performance - Bank 1) and for P0605 (Engine Control Module - ROM Error) on certain 2015 and 2016 model year Sonata (LF) vehicles equipped with a 2.4L GDI engine. The vehicle may exhibit one or more of the following conditions: ? DTC P200A (Intake Manifold Runner Performance - Bank 1) ? Check Engine Light ON ? Automatic transmission upshift hesitation ? Clicking noise from the intake manifold VCM (Variable Charge Motion) actuator when the engine RPM is increased ? (2015 MY Only) DTC P0605 (Engine Control Module ? ROM Error) ? Check Engine Light ON ? Electronic Stability Control (ESC) Warning Light ON ? Limited engine power (?Limp Home?) mode
5NP-E2C3Q-092017-09-14. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. This bulletin provides information on how to return a Hyundai HEV/PHEV/EV/Fuel Cell Lithium Battery for proper disposal and safe environmental recycling using Hyundai?s authorized vendor Kinsbursky Brothers Inc. (KBI).
5NP-Y9Y9T-072017-08-17. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. When towing a trailer with some LF/LF-HEV/LF-PHEV Sonatas or some AN/NC Santa Fe vehicles equipped with the Blind Spot Detection (BSD) feature, the trailer may interfere with the BSD system operation resulting in cancellation of the BSD operation. When this occurs, a ?BSD canceled? message is displayed in the vehicle?s instrument cluster. The ?BSD canceled? message remains on even if the customer manually disables the BSD system, and may result in customer complaints. This bulletin provides the service procedure to update the system software to turn off the ?BSD canceled? message when the BSD system is manually disabled.
5NP-D5E6F-122017-01-26. Service bulletin. ENGINE; ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR. CERTAIN SONATA VEHICLES EQUIPPED WITH THE 1.6L TURBO ENGINE HAVE A MANUAL ALTERNATOR BELT TENSIONER SYSTEM. THE TOP ALTERNATOR MOUNTING BOLT (A IN THE DIAGRAM) MAY BREAK OVER TIME IF IT IS TIGHTENED OVER SPECIFICATION AND COULD RESULT IN ILLUMINATION OF THE BATTERY WARNING LIGHT AND/OR THE ENGINE OVERHEATING IN SOME CASES. THIS BULLETIN DESCRIBES THE PROCEDURE TO REPLACE THE TOP ALTERNATOR MOUNTING BOLT.
5NP-B8B9B-122017-01-26. Service bulletin. ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR. HYUNDAI MOTOR AMERICA IS CONDUCTING A SERVICE CAMPAIGN TO REPLACE THE TOP ALTERNATOR MOUNTING BOLT ON CERTAIN 2015-17 MODEL YEAR SONATA 1.6L VEHICLES. SERVICE CAMPAIGN TTT PROVIDES A PROCEDURE TO REPLACE THE TOP ALTERNATOR MOUNTING BOLT.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.